U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 27, 2025

All TitlesTitle 43Chapter IIPart 3930Subpart 3931 - Subpart 3931—Plans of Development and Exploration Plans
§ 3931.10 - Exploration plans and plans of development for mining and in situ operations.
§ 3931.11 - Content of plan of development.
§ 3931.20 - Reclamation.
§ 3931.30 - Suspension of operations and production.
§ 3931.40 - Exploration.
§ 3931.41 - Content of exploration plan.
§ 3931.50 - Exploration plan and plan of development modifications.
§ 3931.60 - Maps of underground and surface mine workings and in situ surface operations.
§ 3931.70 - Production maps and production reports.
§ 3931.80 - Core or test hole samples and cuttings.
§ 3931.100 - Boundary pillars and buffer zones.
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